HAYWARD — A common scenario experienced by homeowners is a garage door that’s stuck in the open position, which is usually accompanied by a blinking overhead light and clicking sound. If you experience this, you may think you need to call a professional. However, in most cases, this issue stems from a problem with the safety sensors, which is something you can usually solve yourself.
Situated at about ankle height on either side of the door, the safety sensors protect against door-related injury and damage. Either sensor has an “eye,” which enables it to transmit a signal to the other. In order for the door to function properly, these two eyes need to be in alignment. If communication between them is interrupted, the garage door won’t close.
There are a couple things that can cause the safety sensors to malfunction. One is if something is blocking the transmission between the two eyes. Many times, the cause is obvious; however, even something as insignificant as a spider web can interrupt the signal, so be sure to look closely when checking for obstructions.
The other possibility is that the sensor eyes are out of contact with each other. Either sensor has a green light; if the light is solid, you know the sensors are in alignment. If the light is blinking (and there are no obstructions), try readjusting one or both sensors until the light is solid on both sides.

by Amie Prendergast, a Diamond Certified Expert Contributor

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